Selector* Contextualize::operator()(Selector_Group* s)
{
Selector_Group* p = static_cast<Selector_Group*>(parent);
Selector_Group* ss = 0;
if (p) {
ss = new (ctx.mem) Selector_Group(s->path(), s->line(), p->length() * s->length());
for (size_t i = 0, L = p->length(); i < L; ++i) {
for (size_t j = 0, L = s->length(); j < L; ++j) {
parent = (*p)[i];
Selector_Combination* comb = static_cast<Selector_Combination*>((*s)[j]->perform(this));
if (comb) *ss << comb;
}
}
}
else {
ss = new (ctx.mem) Selector_Group(s->path(), s->line(), s->length());
for (size_t j = 0, L = s->length(); j < L; ++j) {
Selector_Combination* comb = static_cast<Selector_Combination*>((*s)[j]->perform(this));
if (comb) *ss << comb;
}
}
return ss->length() ? ss : 0;
}
void Extend::operator()(Ruleset* r)
{
Selector_Group* sg = static_cast<Selector_Group*>(r->selector());
Selector_Group* ng = 0;
bool extended = false;
if (sg->has_placeholder()) {
// To_String to_string;
Simple_Selector_Sequence* placeholder = new (ctx.mem) Simple_Selector_Sequence(sg->path(), sg->line(), 1);
*placeholder << sg->find_placeholder();
// cerr << "placeholder: " << placeholder->perform(&to_string) << endl;
// if the placeholder needs to be subbed
if (extensions.count(*placeholder)) {
// cerr << "need to sub " << placeholder->perform(&to_string) << " " << extensions.count(*placeholder) << " times" << endl;
// perform each substitution and append it to the selector group of the ruleset
ng = new (ctx.mem) Selector_Group(sg->path(), sg->line(), extensions.count(*placeholder));
for (multimap<Simple_Selector_Sequence, Selector_Combination*>::iterator extender = extensions.lower_bound(*placeholder), E = extensions.upper_bound(*placeholder);
extender != E;
++extender) {
// cerr << "performing a substitution: " << placeholder->perform(&to_string) << " -> " << extender->second->perform(&to_string) << endl;
Contextualize sub_plc(ctx, 0, 0, backtrace, placeholder, extender->second);
Selector_Group* subbed = static_cast<Selector_Group*>(sg->perform(&sub_plc));
// if (subbed) cerr << "subbed: " << subbed->perform(&to_string) << endl;
*ng += subbed;
extended = true;
}
ng->has_placeholder(false);
}
// otherwise prevent it from rendering
else {
// r->selector(0);
}
}
else {
ng = new (ctx.mem) Selector_Group(sg->path(), sg->line(), sg->length());
// for each selector in the group
for (size_t i = 0, L = sg->length(); i < L; ++i) {
Selector_Combination* sel = (*sg)[i];
*ng << sel;
// if it's supposed to be extended
Simple_Selector_Sequence* sel_base = sel->base();
To_String to_string;
if (sel_base && extensions.count(*sel_base)) {
// extend it wrt each of its extenders
for (multimap<Simple_Selector_Sequence, Selector_Combination*>::iterator extender = extensions.lower_bound(*sel_base), E = extensions.upper_bound(*sel_base);
extender != E;
++extender) {
*ng += generate_extension(sel, extender->second);
extended = true;
}
}
}
}
if (extended) r->selector(ng);
r->block()->perform(this);
}